Mercedes-Benz Actros 2017, Operating Instructions Manual, Page: 397 / 436

If you fill the compressed-air system via con-
nection 28
;
on the electronic air processing
unit, the pressure circuit of the air suspension is
also filled.
i The electronic air processing unit contains
the following components in one unit:
R
pressure regulator
R
compressed-air dryer
R
multiple-circuit safety valve
R
pressure limiting valve
R
control unit
Before towing, check that the spring-loaded cyl-
inders of the parking brake are released. If the
compressed-air supply is insufficient, release
the spring-loaded cylinders manually
(
Y
page 400).
Jump-starting, tow-starting and tow-
ing away
Jump-starting
Important safety notes
G
WARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any gases released from the bat-
tery. When carrying out maintenance work on
the battery, wear acid-resistant protective
clothing, particularly protective eyewear, pro-
tective gloves and an apron. Do not lean over
the battery. Keep the batteries out of the
reach of children.
If you come into contact with battery acid,
observe the following:
R
immediately rinse battery acid off skin thor-
oughly with clean water and seek immedi-
ate medical attention.
R
if you get battery acid in your eyes, rinse
them thoroughly with clean water immedi-
ately. Consult a doctor without delay.
G
WARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a
risk of an explosion.
Particularly avoid fire, naked flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean over a battery.
! Observe the following notes. You could oth-
erwise damage the battery or electronic com-
ponents in the vehicle:
R
do not use a battery quick-charge unit for
jump-starting.
R
if you use a mobile battery charger (battery
device with mains power stage), remove
the mains plug before jump-starting.
R
only have jump-starting provided by vehi-
cles with a 24 V system.
R
use jump leads which are protected against
polarity reversal and with a wire cross sec-
tion of approximately 35–50 mm
2
and insu-
lated terminal clamps.
R
if the outside temperature drops below
Ò
10 †, a discharged battery could freeze.
Do not start the engine under these cir-
cumstances. Let the battery thaw out first.
!
Do not connect the negative terminal clamp
of the jump lead to the chassis frame. Other-
wise, engine or transmission components can
be damaged.
!
When you remove the jump leads, let the
engine of the vehicle being jump-started idle.
This avoids damage being caused to the vehi-
cle electronics.
General notes
Observe the safety notes and protective meas-
ures when handling the battery (
Y
page 362).
After jump-starting, have the batteries checked
at a qualified specialist workshop.
X Make sure that the vehicles are not touching.
X
Apply the parking brake.
X
Switch off all electrical consumers.
X Switch the ignition lock to position 0.
Jump-starting, tow-starting and towing away
395
Breakdown assistance
Z